EP2729621B1 - Arrangement for supporting a brace, in particular a stay cable, transversely to the longitudinal extent thereof - Google Patents

Description

Technical area:

The invention relates to an arrangement for supporting a tension member, in particular a stay cable or a tension member, transversely to its direction of longitudinal extension in the anchoring region of a building according to the preamble of patent claim 1.

State of the art:

Such tension members are known in particular as stay cables or external tendons of bridge structures, where they play a key role in the recording and removal of existing loads. The consisting of steel bars, steel wires or steel strands tension members are stretched for this purpose between two components of a building, the ends of the tension member are each guided within a channel through the components and anchored to the rear side. In the free area between the anchorages, the tension members are free.

Due to dynamic loads such as Wind loads or traffic loads, but also as a result of temperature-induced deformations of the structure, movements of the tension member in the operating condition, especially in the transverse direction are unavoidable. While such free-range movements are acceptable within limits, they affect the fatigue life of the tension member in the mooring area. This is counteracted by intercepting the movements in the transverse direction.

For this purpose is from the DE 295 04 739 U1 a tension member known which extends in the anchoring area within a clamping channel formed by a recess tube. For concentric fixation of the tension member in the clamping channel this is surrounded by a Ringzugelement, on the one hand bundles the individual strands of the tension member before spreading for anchoring and on the other hand with its outer periphery on the inside of the recess tube applies. In this way movements of the tension member are limited transversely to its longitudinal direction to the area outside of the tension channel and thus increases the fatigue strength of the tension member.

As a result of manufacturing and assembly-related tolerances or slack in diagonal ropes, it is often the case that the actual tension member longitudinal axis deviates from the desired axis. To account for these tolerances, it is necessary not to fix the tension member concentric in the clamping channel, but eccentric. This problem takes in the DE 34 34 620 A1 described invention, where a sufficiently large, the clamping channel over a longitudinal section widening annular chamber within the building room for the eccentric recording of the tension member offers. After sealing the annular chamber it is pressed with a hardening or loose pourable material and fixed in this way the eccentric position of the tension member within the clamping channel. This solution has proven itself many times in practice.

A similar procedure reveals the DE 295 17 250 U1 according to which an annular closed cushion is arranged around the tension member, which forms a closed cavity and can therefore be pressed without further sealing work with a hardening material with simultaneous fixing of the tension member.

In order not to have to spend the time and labor associated with the pressing process, is from the DE 200 14 322 U1 also already known to arrange two circular rings with each eccentric opening into one another, that they can be rotated in the common peripheral joint against each other. In this case, the inner annulus encloses the tension member, while the outer annulus is supported with its outer circumference on the recess tube. By mutually rotating the rings, the opening of the inner ring can be adapted to the eccentricity of the tension member.

Presentation of the invention:

Against this background, the object of the invention is to further develop and improve the support of a tension member in the region close to the anchorage transversely to its longitudinal direction.

This object is achieved by a device having the features of patent claim 1.

Advantageous embodiments will be apparent from the dependent claims.

The basic idea of the invention is to provide an eccentric support of the tension member by the interaction of a plurality of axially successive mechanical components, whereby by providing eccentric to each other bearing and bearing surfaces on the components parts eccentricities E ₁ and E ₂ arise, which by appropriate superposition in the course of Assembly of the individual components in a predetermined relative position to each other give the existing eccentricity. The adhesion between the individual components via the axially load bearing and bearing surfaces, which are clamped together by means of axial clamping elements.

A first advantage of the invention results from the development in the axial direction of construction, ie in a direction in which tension members normally have enough free space. In the radial direction, the arrangement according to the invention can be kept slim, which is advantageous not only visually, but also in view of the limited space available in the anchorage area.

Due to the axial connection of the arrangement according to the invention to the recess tube, the location of the installation is in contrast to the known solutions outside of the recess tube and is therefore easily accessible from the outside. This not only facilitates the assembly and disassembly of an arrangement according to the invention, but also their maintenance and repair if necessary.

Should the eccentricity E of the tension member change in the course of time as a result of the deformation behavior of the structure, the arrangement according to the invention, due to its ability to be dismantled, allows a subsequent adaptation to the changed geometry without any problems.

Another advantage of the invention is that structural precautions on the structure, such as the provision of an annular chamber in the recess tube, are not necessary. This makes first advantageous in economic terms noticeable, since the corresponding amount of work does not arise. At the same time, the arrangement according to the invention but also the retrofitting or retrofitting of existing structures without much design overhead on the building itself.

Since an inventive arrangement is made only by the assembly of less mechanical components, the time and material required for this is very low, which further increases the efficiency of the invention.

In an advantageous embodiment of the invention, the two Teilxzentrizitäten E ₁ and E _{2 are the} same size, resulting in the possibility of setting the arrangement according to the invention also on a centrally extending in the recess tube tension member. With an existing eccentricity E, which is greater than the sum of the two equal part eccentricities E ₁ and E ₂ , it is also conceivable that one of the two Teilxzentrizitäten E ₁ or E _{2 is} greater than the other by the use of a special adapter ring or support ,

Also proves to be advantageous embodiment of the invention, in which in addition to the axially resilient bearing or bearing surfaces still radially resilient bearing surfaces are provided. The radially load bearing surfaces primarily assume the function of guiding and centering surfaces, which facilitate both the axial mating of the individual components as well as their rotation about the longitudinal axis.

The axially loadable bearing or bearing surfaces can be composed of several stepped in the axial direction of partial surfaces. The axial offset of the partial surfaces can advantageously be used to form the radially load bearing surfaces. Thus, it is possible that the axial compressive forces are removed in the contact joint over a relatively large composite bearing or bearing surface, which contributes to the overall stability of the compound.

The axially and / or radially loadable bearing or bearing surfaces can be equipped slip-resistant according to an advantageous embodiment of the invention. This can be achieved by suitable surface roughness or by coating with anti-slip materials such as zinc silicate or the like. The slip-resistant equipment increases the adhesion between the individual components and thus their positional safety.

The clamping of the components of an inventive arrangement is advantageously carried out by means of a clamping ring and clamping bolt. By a relative position of the clamping bolt radially outside of the axially loadable bearing or bearing surfaces a stepless adjustment of the part eccentricities E ₁ and E _{2 is} ensured and thus a high-precision adaptation to a given eccentricity E.

To avoid bending stresses in the clamping ring and / or the clamping bolt, a further advantageous embodiment of the invention has a spacer ring between the annular flange of the recess tube and the adapter ring. To simplify the assembly of the spacer ring may be welded to the annular flange or adapter ring.

Especially in a subsequent assembly of the inventive arrangement on a tension member, it proves to be an advantage if the adapter ring and / or the support element and / or the clamping ring are divided into two. Thus, the two halves can be arranged around the tension member and held together without having to dismantle the tension member for assembly or disassembly.

Brief description of the drawings:

The invention will be explained in more detail below with reference to an embodiment shown in the drawings, wherein further features and advantages of the invention are disclosed. To facilitate understanding, the same reference numerals are used in the individual figures for identical or functionally identical features, as far as this makes sense.

Fig. 1

eine Teilansicht auf eine Schrägseilbrücke mit einer erfindungsgemäßen Anordnung,

Fig. 2

einen Längsschnitt durch den in Fig. 1 mit II gekennzeichneten Bereich, die

Fig. 3, 4

jeweils eine Schrägansicht des in Fig. 2 mit III gekennzeichneten Bereichs einer erfindungsgemäßen Anordnung in einer Explosionsdarstellung,

Fig. 5

einen Längsschnitt durch die in den Figuren 3 und 4 dargestellte Anordnung,

Fig. 6

vier Ansichten A - A bis E - E wie in Fig. 5 angegeben,

Fig. 7

einen Teillängsschnitt durch den Anschlussbereich von Abstützelement und Adapterring in größerem Maßstab,

Fig. 8

einen Teillängsschnitt durch eine Weiterentwicklung der erfindungsgemäßen Anordnung, die

Fig. 9a-e

weitere Ausführungsformen der Erfindung jeweils im Längsschnitt, und die

Fig. 10a-c

Beispiele zur zentrischen und exzentrischen Abstützung eines Schrägseils mit Hilfe einer erfindungsgemäßen Anordnung.

Show it

Fig. 1

a partial view of a cable-stayed bridge with an inventive arrangement,

Fig. 2

a longitudinal section through the in Fig. 1 marked with II area, the

Fig. 3, 4

in each case an oblique view of the in Fig. 2 III marked area of an arrangement according to the invention in an exploded view,

Fig. 5

a longitudinal section through the in the FIGS. 3 and 4 illustrated arrangement,

Fig. 6

four views A - A to E - E as in Fig. 5 stated

Fig. 7

a partial longitudinal section through the connection region of the support element and adapter ring on a larger scale,

Fig. 8

a partial longitudinal section through a further development of the inventive arrangement, the

Fig. 9a-e

further embodiments of the invention in each case in longitudinal section, and the

Fig. 10a-c

Examples of centric and eccentric support of a cable with the aid of an inventive arrangement.

Ways to carry out the invention and commercial usability:

In Fig. 1 one sees a part of a cable-stayed bridge 1 with a pylon 2 made of reinforced concrete, on which a roadway carrier 3 is suspended by means of stay cables 4. The anchoring areas for the stay cables 4 on the pylon 2 and the roadway carrier 3 are formed by a clamping channel, which consists essentially of a steel recess tube 5, which has been passed through the pylon 2 and the carriageway carrier 3 and cast in the course of their production. The clamping channel or the recess tube 5 serves to receive a respective stranded cable 4.

Fig. 2 gives the in Fig. 1 with "II" marked lower anchoring area on a larger scale again. It can be seen a coaxially along a first longitudinal axis 6 extending recess tube 5, which penetrates the carriageway carrier 3 and ends flush with its underside an abutment pedestal 7 present there. At the top of the roadway carrier 3, the recess tube 5 forms a projection. The anchoring area in the area of the pylon 2 is essentially designed accordingly, taking into account necessary modifications for adaptation to the local conditions.

Within the recess tube 5 runs the tension member 4, which in the present example is formed by a bundle of individual elements 8, e.g. Steel wire strands is formed, which are arranged within a protective tube 9. The annular gap between the protective tube 9 and the individual elements 8 can be filled with a hardening corrosion protection compound. The tension member longitudinal axis is identified by the reference numeral 12.

In the free area of the tension member 4, the individual elements 8 extend parallel to each other at a close radial distance parallel to each other. In order to provide sufficient space for the anchoring of the individual elements 8, the individual elements 8 are spread in the anchoring area within the recess tube 5 in the direction of anchoring. To accommodate the occurring in the transition region as a result of the spreading Ringzugkräfte the individual elements 8 are surrounded by a Ringzugelement 10 cuff-like, which in turn has on its outer circumference elastomeric bearing 11.

The individual elements 8 are fixed by means of wedges in an anchor block 13, which is connected via an external thread with a ring nut 14 in engagement. The ring nut 14 is supported on a support plate 15, which in turn rests on the abutment base 7 and the tensile forces from the tension member 4 enters the structure 1. A cap 16, which is tightly connected to the ring nut 14 and filled with a corrosion protection compound surrounds the free ends of the individual elements eighth

In the free area, the tension member 4 is surrounded by a HDPE piping 17, which ends at an axial distance in front of the recess tube 5.

Due to manufacturing and assembly-related tolerances and load-induced deformations of the structure fall in the anchoring area, the longitudinal axis 6 of the recess tube 5 and the longitudinal axis 12 of the tension member 4 is often not together. This has the consequence that the tension member 4 is not centrally connected to the recess tube 5, but there has an eccentricity E with respect to the longitudinal axis 6.

In order to keep the negative effects of transverse movements of the tension member 4 described in the immediate anchoring area as low as possible, the tension member 4 is secured in the region of the Ringzugelements 10 by means of a support against movements transverse to its longitudinal axis 12. For this purpose, a tubular support member 18, which serves with its one end to a sleeve-like Extension 19 of the casing 17 connects and is rigidly connected to the recess tube 5 with its opposite end on the flange connection according to the invention. In this way, it is possible that the tension member 4 with the elastomeric bearings 11 on the inner periphery of the support member 18 applies and is held in position. The support element 18 is already adjusted during its mounting on the existing eccentricity E of the longitudinal axis 12 relative to the longitudinal axis 6. The necessary constructive training will be described below with reference to FIGS. 3 to 7 explained in more detail.

The FIGS. 3 to 5 and 7 show the arrangement according to the invention in each case in an exploded view. The end of the recess tube 5 can be seen with the individual components of the support element 18 to be connected to the recess tube 5. For this purpose, an annular flange 20 encircling the outer circumference of the recess tube 5 forms the end of the recess tube 5. With its the support element 18 facing and to the longitudinal axis 6 vertical side of the annular flange 20 forms a first axially resilient bearing surface 21, which is surrounded by a number on a common circumferential circle and lying at equal circumferential intervals axial through holes 22. An axial view of the annular flange 20 shows Fig. 6 , View AA.

With the annular flange 20, an adjoining in the axial direction adapter ring 23 cooperates, which encloses a central opening 30. The annular flange 20 facing first side of the adapter ring 23 is in Fig. 6 , View BB shown, the opposite second side in view CC. The FIGS. 3 to 6 and particularly FIG. 7 , make it clear that the first side of the adapter ring 23 along the outer periphery has a concentric with the longitudinal axis 6 encircling a recess resulting edge recess 24. In this way, a first stepped axially load bearing surface 25 'and a radially resilient bearing surface 25 "( Fig. 7 ). When assembling the arrangement according to the invention, the adapter ring 23 can be positively inserted into the end of the recess tube 5 with the bearing surface 25 "until the bearing surface 25 'abuts against the annular flange 20 of the recess tube 5. At this time of assembly, the adapter ring 23 can still be placed around the Longitudinal axis 6 to set a predetermined first part eccentricity E _{1 are} rotated.

From the FIGS. 3 to 6 and particularly FIG. 7 In addition, the specific configuration of the second side of the adapter ring 23 is apparent. There is along the inner circumference of the opening 30 to a second axis 28 concentrically encircling step-shaped edge recess 29 is provided, whose axis 28 extends axially parallel to the axis 6 with a first part eccentricity E ₁ . As a result of the peripheral recess 29, a second stepped axially load bearing surface 27 'and a second radially load bearing surface 27 "(FIG. FIG. 7 ). The two edge recesses 24 and 29 each have a rectangular cross-section, wherein the radial cross-sectional dimension of the edge recess 29 continuously changes due to the part eccentricity E ₁ . The radially load bearing surface 25 "and bearing surface 27" may also have a slightly conical shape to facilitate the axial connection of the adapter ring 23 to the recess tube 5 and the support member 18 to the adapter ring 23.

The edge recess 29 in the adapter ring 23 serves for the axial connection of a tubular support member 18, which is composed of a tubular portion 31 whose inner periphery is intended to support the tension member 4, and an eccentric flange 32 fixed to the adapter ring 23 facing the end of the tubular Section 31 is connected. In this case, the longitudinal axis of the tubular portion 31 coincides with the axis 12 of the tension member 4.

Along its outer circumference, the eccentric flange 32 has a peripheral outer edge recess 26, by means of which - in a manner analogous to that of the adapter ring 23 - a second axially loadable support surface 33 'and a radially loadable support surface 33 "are created Adapter ring 23 and eccentrically to the opening of the tubular portion 31 and the axis 12, resulting in a second partial eccentricity E ₂ results.

The second axially loadable bearing surface 33 'of the eccentric flange 32 is formed complementary to the second axially loadable bearing surface 27' of the adapter ring 23. By rotating the support member 30 relative to the adapter ring 23 about the axis 28 during assembly of an assembly according to the invention, the direction of the part eccentricity E _{2 can be} adjusted.

To fix the adapter ring 23 and the support member 18 in a predetermined relative position relative to the recess tube 5 is a clamping ring 34. The clamping ring 34 has an opening 35 whose diameter is smaller than the outer periphery of the Exzenterflansches 32 so that in each position an axial abutment of Clamping ring 34 is ensured on Exzenterflansch 32. The opening 35 can extend both centrally and eccentrically relative to the outer circumference of the clamping ring 34.

In the clamping ring 34 axial through holes 36 are arranged whose hole pattern corresponds to that of the annular flange 20, so that the clamping ring 34 by means of the axial clamping bolt 37 and associated nuts 38 under clamping of the adapter ring 23 and Exzenterflansches 32 can be clamped against the annular flange 20 ( Fig. 5 and 8th ).

In the following, the assembly of an arrangement according to the invention is explained in more detail taking into account an optionally existing deviation of the longitudinal axis 12 of a tension member 4 from the longitudinal axis 6 of the anchoring.

After installation of the tension member 4, the eccentricity E of the tension member 4 with respect to the longitudinal axis 6 of the recess tube 5 is measured. On the basis of the existing eccentricity E, the relative desired position of the adapter ring 23 relative to the recess tube 5 and the relative desired position of the support element 18 relative to the adapter ring 23 can then be determined. The only degree of freedom to achieve the desired position is the individual rotation of the adapter ring 23 and the support member 18 about their longitudinal axes, wherein in each case the radial direction of the part eccentricity E ₁ and E ₂ can be adjusted. Vector addition of the partial eccentricities E ₁ and E ₂ results in this way in the measure and the direction of the total eccentricity E. Adapter ring 23 and support member 18 are thus in view of the existing eccentricity E and taking into account the previously determined directions of Teilxzentrizitäten E ₁ and E. _{2 of} the tension member 4 set in the axial direction on the end of the recess tube 5 and clamped by means of the clamping ring 34, the clamping bolt 37 and nuts 38 against the annular flange 20 and thereby fixed in the required relative position to each other. This condition is fragmentary in Fig. 8 shown.

The FIGS. 10a to 10c show by way of example three possible embodiments of the eccentricity E, which may occur during the assembly of a tension member 4. Fig. 10a shows the centric position of the tension member 4 within the recess tube 5, Fig. 10b a relative Position of the tension member 4 with respect to the recess tube 5, in which the maximum compensated eccentricity E is reached, and Fig. 10c the most common rule case in which the eccentricity E of the tension member 4 is smaller than the maximum compensated eccentricity E. Here, point 39 denotes the longitudinal axis 6 of the recess tube 5, point 39 ', the position of the axis 28 due to the Teilxzentrizität E ₁ after setting the Adapter ring 23 and point 39 "the position of the longitudinal axis 12 of the tension member 4 after adjusting the eccentricity E ₂ by rotating the support member 18 and superposition of the two eccentricities E ₁ and E ₂ .

In the case of the centric course of the tension member longitudinal axis 12 within the recess tube 5 (FIG. Fig. 10a ), the adapter ring 23 and the support member 18 are assembled such that the Teilxzentrizitäten E ₁ and E _{2 act} in the opposite direction. If the part eccentricities E ₁ and E _{2 are the} same, they cancel each other out and the measure of the total eccentricity E is zero.

The maximum total eccentricity E ( Fig. 10b ) is achieved when the part eccentricity E _{1 of} the adapter ring 23 and the part eccentricity E _{2 of} the support member 18 point in the same direction, so add up.

The areas between a central position of the tension member longitudinal axis 12 in the recess tube 5 and a maximum compensable eccentric position of the tension member longitudinal axis 12 are indicated by the circular line 48 and can be covered by a suitable superposition of the two Teilxzentrizitäten E ₁ and E ₂ , which, for example, in FIG. 10c is shown. There, the direction of the partial eccentricity E ₁ is first set by suitable rotation of the adapter ring 23 about its longitudinal axis obliquely to the right bottom (135 ° from the vertical). In the course of placing the support member 18, whose part eccentricity E ₂ to the left (270 ° from the vertical), the direction and the degree of the desired total eccentricity E.

The FIGS. 8 and 9 show variations of the under FIGS. 1 to 7 described invention. In FIG. 8 one sees a partial longitudinal section through the connection region of adapter ring 23 and support element 30 to the recess tube 5. This embodiment largely corresponds to that in FIGS FIGS. 1 to 7 described so that what is said there applies and use the same reference numerals.

In addition, the in Fig. 8 illustrated embodiment, a support ring 40, which bridges the axial distance between the annular flange 20 and clamping ring 34. The support ring 40 extends over the entire circumference radially outside of the through holes 22 and 36 and is preferably welded to the annular flange 20 or the clamping ring 34.

Based on FIGS. 9a to 9d further embodiments of the invention are explained, wherein Fig. 9a a simplified embodiment relates. The recess tube 5 shown there with annular flange 20 corresponds to that under the FIGS. 1 to 8 described. The adapter ring 23 'is formed by a planar annular disk whose outer circumference is concentric with the inner circumference. Also concentric with the outer circumference, a first pitch circle is provided with a series of threaded holes whose hole pattern corresponds to the hole pattern of the through holes 22 in the annular flange 20. A second circle of holes with a smaller diameter is eccentric with respect to the first circle of holes and concentric with the inner circumference of the adapter ring 23 ', wherein its hole pattern corresponds to the hole pattern of the through holes 36 in the clamping ring 34. By means of the bolts 42 assigned to the first bolt circle, the adapter ring 23 'is screwed onto the ring flange 20 in such a way that the part eccentricity E _{1 points} in the predetermined direction. The adjustment of the eccentricity E ₁ by rotating the adapter ring 23 'is only gradually in the circumferential distance of the through holes 22 possible.

The threaded holes of the second pitch circle serve to connect the support element 18, which is screwed with its Exzenterflansch 32 'by means of the second pitch circle associated screws 44 from the opposite side via the through holes 45 to the adapter ring 23'. Adjusting the part eccentricity E ₂ by turning about the longitudinal axis is only possible here in stages in the grid of the circumferential distance of the threaded holes of the second pitch circle.

In Fig. 9b is a first evolution of the in FIG. 9a shown embodiment, in which the support member 18 is continuously adjustable to the part eccentricity E ₂ . The recess tube 5 and the connection of the adapter ring 23 "to the recess tube 5 corresponds to the lower Fig. 9a described.

The embodiment according to Fig. 9b is different from the one in Fig. 9a described in that the second bolt circle in the adapter ring 23 "has a larger diameter than the outer circumference of the axially connected Exzenterflansches 32. In this way, the screws 44 are radially outside the Exzenterflansches 32 and practice on the clamping ring 34 only a clamping force in the outermost edge region of the eccentric flange 32. The screws 44 do not hinder the rotation of the support element 18 about its longitudinal axis, so that its stepless rotation relative to the adapter ring 23 "is possible.

In order to best prevent bending stresses in the screws 44 and in the clamping ring 34, a spacer ring 46 is arranged between adapter ring 23 "and clamping ring 34, which is penetrated by the screws 44. The spacer ring 46 can be loose between the adapter ring 23" and the clamping ring 34 be inserted or be formed as an annular shoulder on the adapter ring 23 "or clamping ring 34.

The embodiment according to the invention Fig. 9c allows continuous adjustment of the part eccentricity E ₁ . To this end, the adapter ring 23 "'protrudes with its outer circumference radially beyond the outer circumference of the annular flange 20'. A clamping flange 47 is stretched by means of the screws 42 against the adapter ring 23"'and engages behind the annular flange 20'. Again, between the adapter ring 23 "'and the clamping flange 47 a penetrated by the screws 42 spacer ring 43 may be arranged, which is loosely inserted between the two parts or as an annular shoulder on the clamping flange 47 or the adapter ring 23''is formed. The remaining structural design of the connection of the support member 18 to the adapter ring 23 '' corresponds to the below Fig. 9a described.

In the Fig. 9d embodiment shown corresponds to a combination of in the FIGS. 9b and 9c illustrated embodiments, which allows by clamped attachment of the adapter ring 23 "" on the annular flange 20 'of the recess tube 5 and the Exzenterflansch 32 of the support member 18, a continuous adjustment of both the part eccentricity E ₁ and the part eccentricity E ₂ .

It is understood that the invention is not limited to the feature combinations of the individual embodiments, but also includes combinations of the features of different embodiments.

Claims (10)

1. Arrangement for supporting a tension member (4), in particular a stay cable or a tendon, transversely with respect to a longitudinal extent direction thereof in the region of a structure (1) which is close to the anchorage,

   - comprising a cavity pipe (5) which receives the tension member (4) in the region close to the anchorage and extends coaxially along a first longitudinal axis (6), one end of said cavity pipe having a first axially loadable bearing surface (21) that is concentric with respect to the first longitudinal axis (6), characterised by an adapter ring (23)
   which has a first axially loadable support surface (25') on its first side facing the cavity pipe (5), which bearing surface extends concentrically with respect to the first longitudinal axis (6) and is designed for mounting the adapter ring (23) in a predetermined position on the first bearing surface (21) of the cavity pipe (5) after rotation about the first longitudinal axis (6), and

   - which has a second axially loadable bearing surface (27') on its second side facing away from the cavity pipe (5), which bearing surface extends concentrically with respect to a second longitudinal axis (28) and has an eccentricity E₁ with respect to the first longitudinal axis (6),

   - a tubular or annular supporting element (18) that has a second axially loadable support surface (33') which is arranged concentrically with respect to the second axially loadable bearing surface (27') of the adapter ring (23) and the opening in which, which encircles a third longitudinal axis (12), forms a supporting surface for the tension member (4) by means of its inner circumference, the opening having an eccentricity E₂ with respect to the second axially loadable support surface (33') of the supporting element (18),

   - fastening means (37, 38) for axially clamping the cavity pipe (5), the adapter ring (23) and the supporting element (18) in their position relative to one another.
2. Arrangement according to claim 1, characterised in that the degree of partial eccentricity E₁ is equal to or less than the degree of partial eccentricity E₂.
3. Arrangement according to either claim 1 or claim 2, characterised in that the adapter ring (23) has, on its first side, a first radially loadable bearing surface (25") which cooperates in a positive-fit manner with a radially loadable surface, preferably the inner circumference, of the cavity pipe (5).
4. Arrangement according to any of claims 1 to 3, characterised in that the adapter ring (23) has, on its second side, a second radially loadable bearing surface (27") which cooperates in a positive-fit manner with a radially loadable surface (33") on the supporting element (18).
5. Arrangement according to any of claims 1 to 4, characterised in that the adapter ring (23) has, on its first and/or second side, an annular recess (24, 29), and the first axially loadable support surface (25') and/or the second axially loadable bearing surface (27') is/are formed by two partial surfaces having an axial offset.
6. Arrangement according to claim 5, characterised in that the surface of the recess (24, 29) which forms the axial offset in each case forms the radially loadable bearing surface (25", 27").
7. Arrangement according to any of claims 1 to 6, characterised in that the contact surfaces between the cavity pipe (5) and the adapter ring (23) and/or between the adapter ring (23) and the supporting element (18) are slip-resistant at least in part.
8. Arrangement according to any of claims 1 to 7, characterised in that the fastening means includes at least one clamping ring (34) which is clamped against the ring flange (20) of the cavity pipe (5) via clamping bolts (37), in order to clamp the adapter ring (23) and the supporting element (18).
9. Arrangement according to claim 8, characterised in that a spacer ring (40) is arranged between the clamping ring (34) and the cavity pipe (5) and bridges the axial spacing therebetween.
10. Arrangement according to either claim 1 or claim 2, characterised in that the adapter ring (23) and/or the supporting element (18) and/or the clamping ring (34) has/have a multipart, preferably two-part, design.

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